Auto darkening filter for a welding helmet



FIG. 1 is a top, front, right side perspective view of an auto darkening filter for a welding helmet showing my new design;

FIG. 2 is a top, rear, left side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left elevational side view thereof;

FIG. 6 is a right elevational side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines shown in the drawings represent portions of the auto darkening filter for a welding helmet that form no part of the claimed design. 

CLAIM The ornamental design for an auto darkening filter for a welding helmet, as shown and described. 